package com.webserver.core;

import com.webserver.http.HttpServletRequest;

import java.io.*;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;

/*
    线程任务
    负责与特点的客户端进行HTTP交互.
* */
public class ClientHandler implements Runnable {
    private Socket socket;

    public ClientHandler(Socket socket) {
        this.socket = socket;
    }

    public void run() {
        try {
            //http://localhost:8088/myweb/index.html
            //http://localhost:8088/myweb/classTable.html

            //1解析请求
            HttpServletRequest request = new HttpServletRequest(socket);
            //2处理请求
            String path = request.getUrl();
            //3发送响应
            //将./webapps/myweb/index.html 相应个服务器"./webapps"+path
            File file = new File("./webapps" + path);//(File表示硬盘上的一个文件或目录)
            //状态行相关信息
            int statusCode;
            String statusReason;

            if(file.isFile()){
                statusCode = 200;
                statusReason = "OK";
            }else {//不存在活着定位的是一个目录
                statusCode = 404;
                statusReason="NotFound";
                file = new File("./webapps/root/404.html");
            }
                /*
                 * HTTP/1.1 200 OK(CRLF)
                 * Content - Type:text/html(CRLF)
                 * Content - Length:2546(CRLF)(CRLF)
                 * 101110101010101.。。。。。
                 * */
                OutputStream out = socket.getOutputStream();
                //3.1发送状态行
                String line = "HTTP/1.1"+" "+statusCode+" "+ statusReason;
                byte[] data = line.getBytes("ISO8859-1");
                out.write(data);
                out.write(13);
                out.write(10);

                //3.2发送响应头
                line = "Content-Type: text/html";
                data = line.getBytes("ISO8859-1");
                out.write(data);
                out.write(13);
                out.write(10);

                line = "Content-Length:" + file.length();
                data = line.getBytes("ISO8859-1");
                out.write(data);
                out.write(13);
                out.write(10);

                //单独发送CRLF表示相应头部分发送完毕
                out.write(13);//发送一个回车符
                out.write(10);//发送一个换行符

                //3.3发送相应正文
                FileInputStream fis = new FileInputStream(file);
                int len;
                byte[] buf = new byte[1024 * 10];
                while ((len = fis.read(buf)) != -1) {
                    out.write(buf, 0, len);
                }
                System.out.println("响应发送完毕");
            } catch(IOException e){
                e.printStackTrace();
            } finally{
                try {
                    //响应后断开连接
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }

        }

    }
